#ifdef ONPC
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#ifdef ONPC
#include "debug.hpp"
#else
#define debug(...) 42
#endif
using namespace std;
#define int long long
#define nl "\n"

void solve()
{
    int n;
    cin >> n;
    vector<int> a(n);
    for (int &val : a)
    {
        cin >> val;
    }
    int sum = a[0] + a[n - 1];
    bool f = true;
    for (int i = 0; i < n; ++i)
    {
        if (sum != (a[i] + a[n - i - 1]))
            f = false;
    }
    if (f)
    {
        cout << "Yes" << nl;
    }
    else
    {
        cout << "No" << nl;
    }
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
    // cin >> t;
    for (int i = 0; i < t; ++i)
    {
        debug(i);
        solve();
    }
    return 0;
}